热处理对40CrNiMoA钢板焊接接头组织及力学性能的影响  

Effect of Heat Treatment on Microstructures and Properties of 40CrNiMoA Steel Plate Welded Joint

作　　者：刘艳梅[1] 陈静[2] 王铁钢[1] 赵美兰[3] 赵夕夕 戴慧花 LIU Yanmei;CHEN Jing;WANG Tiegang;ZHAO Meilan;ZHAO Xixi;DAI Huihua(Tianjin University of Technology and Education,Tianjin Key Laboratory of High Speed Cutting and Precision Processing,Tianjin 300222;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016;Tianjin Heavy Equipment Engineering Research Co Ltd,Tianjin 300457)

机构地区：[1]天津职业技术师范大学天津市高速切削与精密加工重点实验室,天津300222 [2]中国科学院金属研究所,沈阳110016 [3]天津重型装备工程研究有限公司,天津300457

出　　处：《特殊钢》2022年第4期95-99,共5页Special Steel

基　　金：国家自然科学基金(51301181,51875555);天津市科技重大专项(18ZXJMTG00050);天津市自然科学基金(19JCYBJC17100);天津市科技特派员项目(20YDTPJC01460);天津市教委科研计划项目(2021ZD005)资助。

摘　　要：本文研究了调质工艺对40CrNiMoA钢板焊接接头显微组织及力学性能的影响。试验结果表明,经830-870℃+550-650℃调质处理后,40CrNiMoA钢3mm板90A10V焊接接头的焊缝区、热影响区、母材区的硬度差异显著减小,形成了回火索氏体组织。调质处理温度越高,焊接接头的焊缝区、热影响区与母材区的组织越均匀,且组织中的碳化物颗粒尺寸增大。40CrNiMoA钢焊接板经850℃油淬、600℃回火后,具有较高的强度(905 MPa)和塑性(13.5%),综合力学性能最优。Effect of quenching and tempring process on the microstructure and mechanical properties of 40CrNiMoA steel welded joints was studied in this paper.The test results indicated that by queching+tempering at 830-870℃+550-650℃the 40CrNiMoA steel 3 mm plate at 90A 10V welded joint hardness difference between weld zone,heat affect-ed zone,and base metal zone is reduced significantly,and tempered sorbite structure is formed.The higher quenching and tempering temperature,the more uniform microstructure among the weld zone,heat affected zone and base metal of welded joint,and the cementite particle grew up in structure.The 40CrNiMoA steel welded joint after oil quenching at 850℃and tempering at 600℃ has higher strength(905 MPa)and plasticity(13.5%).In this case,the comprehensive mechanical properties are best.

关 键 词：40CRNIMOA钢 焊接接头 热处理 组织 性能 

分 类 号：TG156[金属学及工艺—热处理] TG407[金属学及工艺—金属学]